US7969047B2 - Intelligent switch socket - Google Patents

Intelligent switch socket Download PDF

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Publication number
US7969047B2
US7969047B2 US12/479,453 US47945309A US7969047B2 US 7969047 B2 US7969047 B2 US 7969047B2 US 47945309 A US47945309 A US 47945309A US 7969047 B2 US7969047 B2 US 7969047B2
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United States
Prior art keywords
circuit
current
signal
master
slave
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Expired - Fee Related, expires
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US12/479,453
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US20100117457A1 (en
Inventor
Baineng HU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Baihuang Electric Appliances Co Ltd
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Ningbo Baihuang Electric Appliances Co Ltd
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Publication of US20100117457A1 publication Critical patent/US20100117457A1/en
Assigned to NINGBO BAIHUANG ELECTRIC APPLIANCES CO., LTD reassignment NINGBO BAIHUANG ELECTRIC APPLIANCES CO., LTD ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HU, BAINENG
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R29/00—Coupling parts for selective co-operation with a counterpart in different ways to establish different circuits, e.g. for voltage selection, for series-parallel selection, programmable connectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/70—Structural association with built-in electrical component with built-in switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R25/00—Coupling parts adapted for simultaneous co-operation with two or more identical counterparts, e.g. for distributing energy to two or more circuits

Definitions

  • the invention relates to an intelligent switching on/off socket.
  • the general structure of existing power supply sockets includes a housing, jacks arranged in the housing, conducting strips arranged in the jacks, and a parallel connection relationship between the sockets.
  • the plugs of multiple electric devices are plugged into different jacks to form circuits with parallel connection to obtain power supply for the work.
  • jacks in sockets are unrelated to one another, every electrical device being connected to the socket independently of each other, and equipment will not stop working when another device stops working. Therefore, energy waste will occur on some auxiliary equipment following the work of core equipment. (E.g., computers and printers: the work of printers depends on computers, and after computers stop working, work of printers is not necessary again.
  • TV sets and sound boxes the work of sound boxes depends on TV sets, and after TV sets stop working, the work of sound boxes is not necessary again).
  • the power supply of core equipment and auxiliary equipment can only be switched off one by one, and the operation is very troublesome. Therefore, some intelligent sockets with master and slave jacks have been invented with master conducting strips arranged in master jacks and slave conducting strips arranged in slave jacks.
  • the power plugs of core equipment are plugged into the master jacks and the power plugs of auxiliary equipment are plugged into slave jacks.
  • Such a structure enables the auxiliary equipment to be switched off with switching off of core equipment and switched on with switching on of core equipment.
  • the principle is that the difference in power magnitude of the master electric equipment when switching off and on is used to control switching off and switching on of power supply.
  • the disadvantage of existing intelligent switching on/off sockets is: all modes have fixed signal acquisition.
  • the master electric equipment comes in a wide variety and the power difference of electric equipment is very large, great limitation exists in practical application.
  • the invention provides an intelligent socket capable of learning.
  • an intelligent switching on/off socket which includes a housing, jacks arranged on said housing, said jacks include master jacks and slave jacks, master conducting strips arranged in the master jacks, and slave conducting strips arranged in the slave jacks;
  • the intelligent switch socket is characterized in that: a control circuit is also arranged in said housing to make the slave conducting strips connect or disconnect upon connecting or disconnecting of the master conducting strips.
  • the control circuit includes: a current sampling circuit used for current sampling when switching on/off power of the master load; a signal amplification circuit used for amplifying sampling current signals; a reference signal acquisition circuit to determine the magnitude of a reference current according to current amplification signals; a memorizer to save the reference current signal acquired by the reference signal acquisition circuit; a signal comparator to compare the values of the reference current signals with the values of the current amplification signals; a control output circuit to send out control signals in accordance with the compared results from the signal comparator; and a relay to receive control of the control signal from the control output circuit;
  • the relay is connected with the slave conducting strips, the current sampling circuit is connected respectively with an input end of the signal amplification circuit and the master conducting strips, an output end of the signal amplification circuit is connected respectively with an input end of the reference signal acquisition circuit and an input end of the signal comparator, an output end of the reference signal acquisition circuit is connected with an input end of the memorizer, an output end of the memorizer is connected with an input end of the signal comparator, an output end of the signal comparator is connected with an input end of the control output circuit, and an output end of the control output circuit is connected with the relay.
  • the invention is plugged into the commercial power supply, the power plug of the master load is plugged into the master jack of the invention and the power plug of the auxiliary load is plugged into the slave jack of the invention, whence the power switch of the master electric equipment may be switched on entering standby state.
  • the sampling current is acquired via current sampling circuit upon switching on of the master load.
  • the signals of the sampling current are amplified via the signal amplification circuit and sent into the signal comparator; the value of the reference current is determined by the reference signal acquisition circuit in accordance with the current amplification signal.
  • the value of the reference current is memorized in the memorizer.
  • the signal comparator compares the values of the reference current signals in the memorizer with the values of the current amplification signals.
  • the learning function of the invention can be realized via the reference signal acquisition circuit, i.e., different reference signals acquired through the reference signal acquisition circuit may be compared when using electric equipment with different power, therefore the invention may be applied to all kinds of electric equipment with little limitation.
  • FIG. 1 presents the basic principles of the invention.
  • an intelligent switching on/off socket which includes a housing, jacks arranged in said housing, said jacks including master jacks and slave jacks, master conducting strips arranged in the master jacks and slave conducting strips arranged in the slave jacks.
  • a control circuit is also arranged in the housing to make slave conducting strips connect or disconnect upon connection or disconnection of the master conducting strips.
  • the control circuit includes: a current sampling circuit 1 used for current sampling when switching on/off the power of the master load; a signal amplification circuit 2 used for amplifying sampling current signals; a reference signal acquisition circuit 3 to determine the magnitude of a reference current according to current amplification signals; a memorizer 4 to save the reference current signal acquired by the reference signal acquisition circuit 3 ; a signal comparator 5 to compare the values of the reference current signals in the memorizer 4 with the values of the current amplification signals; a control output circuit 6 to send out control signals in accordance with the results of the signal comparator 5 and a relay 7 to receive control of the control signal of the control output circuit 6 .
  • the relay 7 is connected with the slave conducting strips, the current sampling circuit 1 is connected respectively with the input end of the signal amplification circuit 2 and the master conducting strips, the output end of the signal amplification circuit 2 is connected respectively with the input end of the reference signal acquisition circuit 3 and the input end of the signal comparator 5 , the output end of the reference signal acquisition circuit 3 is connected with the input end of the memorizer 4 , the output end of the memorizer 4 is connected with the input end of the signal comparator 5 , the output end of the signal comparator 5 is connected with the input end of the control output circuit 6 , and the output end of the control output circuit 6 is connected with the relay 7 .
  • invention is plugged into the commercial power supply
  • the power plug of the master load is plugged into the master jack of the invention
  • the power plug of the auxiliary load is plugged into the slave jack of the invention, whence the power switch of the master electric equipment may be switched on entering standby state.
  • the Sampling current is acquired via the current sampling circuit 1 upon switching on of the master load. Signals of the sampling current are amplified via the signal amplification circuit 2 and sent into the signal comparator 5 ; the value of the reference current is determined by the reference signal acquisition circuit 3 in accordance with the current amplification signal. The value of the reference current is memorized in the memorizer 4 .
  • the signal comparator 5 compares the values of the reference current signals in the memorizer 4 with the values of the current amplification signals.
  • a change in the magnitude of the current is caused due to the difference in power of power electric equipment when switching on/off.
  • Both value of the sampling current acquired by the current sampling circuit 1 and the subsequent amplified value of the current amplification signals generate change.
  • the detected change of current amplification signals is compared on the basis of a conference current in the signal comparator 5 , and the information is transferred to the control output circuit 6 , and then disconnecting of the relay 7 is controlled by the control output circuit 6 to make the slave conductive strip lose power.

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  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

An intelligent switching on/off socket includes a housing containing master jacks and slave jacks respectively containing master conducting strips and slave conducting strips, and a control circuit. The control circuit includes a current sampling circuit connected to the master conducting strips and a signal amplification circuit. The signal amplification circuit amplifies the sampled current and passes the signal to both a signal comparator, and to a reference signal acquisition circuit which in turn passes the reference signal to a memorizer. The signal comparator compares the reference current signals and current amplification signals, and is connected to a control output circuit. The control output circuit is connected to a relay which is connected to the slave conducting strip. The reference signal acquisition circuit provides a learning function such that multiple electrical devices with differing power needs can be switched on or off respectively depending on their individual power needs.

Description

BACKGROUND OF THE INVENTION
(I) Technology Field
The invention relates to an intelligent switching on/off socket.
(II) Background Technology
The general structure of existing power supply sockets includes a housing, jacks arranged in the housing, conducting strips arranged in the jacks, and a parallel connection relationship between the sockets. When in use, the plugs of multiple electric devices are plugged into different jacks to form circuits with parallel connection to obtain power supply for the work. However, jacks in sockets are unrelated to one another, every electrical device being connected to the socket independently of each other, and equipment will not stop working when another device stops working. Therefore, energy waste will occur on some auxiliary equipment following the work of core equipment. (E.g., computers and printers: the work of printers depends on computers, and after computers stop working, work of printers is not necessary again. TV sets and sound boxes: the work of sound boxes depends on TV sets, and after TV sets stop working, the work of sound boxes is not necessary again). In order to avoid energy waste, the power supply of core equipment and auxiliary equipment can only be switched off one by one, and the operation is very troublesome. Therefore, some intelligent sockets with master and slave jacks have been invented with master conducting strips arranged in master jacks and slave conducting strips arranged in slave jacks. In use, the power plugs of core equipment are plugged into the master jacks and the power plugs of auxiliary equipment are plugged into slave jacks. Such a structure enables the auxiliary equipment to be switched off with switching off of core equipment and switched on with switching on of core equipment. The principle is that the difference in power magnitude of the master electric equipment when switching off and on is used to control switching off and switching on of power supply. The disadvantage of existing intelligent switching on/off sockets is: all modes have fixed signal acquisition. However, because the master electric equipment comes in a wide variety and the power difference of electric equipment is very large, great limitation exists in practical application.
BRIEF SUMMARY OF THE INVENTION
In order to overcome the disadvantage of great limitation in application of intelligent sockets, the invention provides an intelligent socket capable of learning.
The invention solves this technical problem by providing: an intelligent switching on/off socket which includes a housing, jacks arranged on said housing, said jacks include master jacks and slave jacks, master conducting strips arranged in the master jacks, and slave conducting strips arranged in the slave jacks;
The intelligent switch socket is characterized in that: a control circuit is also arranged in said housing to make the slave conducting strips connect or disconnect upon connecting or disconnecting of the master conducting strips. The control circuit includes: a current sampling circuit used for current sampling when switching on/off power of the master load; a signal amplification circuit used for amplifying sampling current signals; a reference signal acquisition circuit to determine the magnitude of a reference current according to current amplification signals; a memorizer to save the reference current signal acquired by the reference signal acquisition circuit; a signal comparator to compare the values of the reference current signals with the values of the current amplification signals; a control output circuit to send out control signals in accordance with the compared results from the signal comparator; and a relay to receive control of the control signal from the control output circuit;
The relay is connected with the slave conducting strips, the current sampling circuit is connected respectively with an input end of the signal amplification circuit and the master conducting strips, an output end of the signal amplification circuit is connected respectively with an input end of the reference signal acquisition circuit and an input end of the signal comparator, an output end of the reference signal acquisition circuit is connected with an input end of the memorizer, an output end of the memorizer is connected with an input end of the signal comparator, an output end of the signal comparator is connected with an input end of the control output circuit, and an output end of the control output circuit is connected with the relay.
In application, the invention is plugged into the commercial power supply, the power plug of the master load is plugged into the master jack of the invention and the power plug of the auxiliary load is plugged into the slave jack of the invention, whence the power switch of the master electric equipment may be switched on entering standby state. The sampling current is acquired via current sampling circuit upon switching on of the master load. The signals of the sampling current are amplified via the signal amplification circuit and sent into the signal comparator; the value of the reference current is determined by the reference signal acquisition circuit in accordance with the current amplification signal. The value of the reference current is memorized in the memorizer. The signal comparator compares the values of the reference current signals in the memorizer with the values of the current amplification signals. When the power supply of the master load is interrupted, a change in the magnitude of the current is caused due to the difference in power of power electric equipment when switching on/off. Both the value of the sampling current acquired by the current sampling circuit and the subsequent amplified value of the current amplification signals generate change. The detected change of current amplification signals are compared on the basis of a conference current in the signal comparator, and information is transferred to the control output circuit, and then disconnection of the relay is controlled by the control output circuit to make the slave conductive strip lose power.
Advantages include: the learning function of the invention can be realized via the reference signal acquisition circuit, i.e., different reference signals acquired through the reference signal acquisition circuit may be compared when using electric equipment with different power, therefore the invention may be applied to all kinds of electric equipment with little limitation.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 presents the basic principles of the invention.
 DETAILED DESCRIPTION OF THE INVENTION
The invention will be explained in further detail with reference to the attached figure and specific modes of implementation as follows.
Referring to FIG. 1, an intelligent switching on/off socket, which includes a housing, jacks arranged in said housing, said jacks including master jacks and slave jacks, master conducting strips arranged in the master jacks and slave conducting strips arranged in the slave jacks.
A control circuit is also arranged in the housing to make slave conducting strips connect or disconnect upon connection or disconnection of the master conducting strips. The control circuit includes: a current sampling circuit 1 used for current sampling when switching on/off the power of the master load; a signal amplification circuit 2 used for amplifying sampling current signals; a reference signal acquisition circuit 3 to determine the magnitude of a reference current according to current amplification signals; a memorizer 4 to save the reference current signal acquired by the reference signal acquisition circuit 3; a signal comparator 5 to compare the values of the reference current signals in the memorizer 4 with the values of the current amplification signals; a control output circuit 6 to send out control signals in accordance with the results of the signal comparator 5 and a relay 7 to receive control of the control signal of the control output circuit 6.
The relay 7 is connected with the slave conducting strips, the current sampling circuit 1 is connected respectively with the input end of the signal amplification circuit 2 and the master conducting strips, the output end of the signal amplification circuit 2 is connected respectively with the input end of the reference signal acquisition circuit 3 and the input end of the signal comparator 5, the output end of the reference signal acquisition circuit 3 is connected with the input end of the memorizer 4, the output end of the memorizer 4 is connected with the input end of the signal comparator 5, the output end of the signal comparator 5 is connected with the input end of the control output circuit 6, and the output end of the control output circuit 6 is connected with the relay 7.
In application, invention is plugged into the commercial power supply, the power plug of the master load is plugged into the master jack of the invention and the power plug of the auxiliary load is plugged into the slave jack of the invention, whence the power switch of the master electric equipment may be switched on entering standby state. The Sampling current is acquired via the current sampling circuit 1 upon switching on of the master load. Signals of the sampling current are amplified via the signal amplification circuit 2 and sent into the signal comparator 5; the value of the reference current is determined by the reference signal acquisition circuit 3 in accordance with the current amplification signal. The value of the reference current is memorized in the memorizer 4. The signal comparator 5 compares the values of the reference current signals in the memorizer 4 with the values of the current amplification signals. When the power supply of the master load is interrupted, a change in the magnitude of the current is caused due to the difference in power of power electric equipment when switching on/off. Both value of the sampling current acquired by the current sampling circuit 1 and the subsequent amplified value of the current amplification signals generate change. The detected change of current amplification signals is compared on the basis of a conference current in the signal comparator 5, and the information is transferred to the control output circuit 6, and then disconnecting of the relay 7 is controlled by the control output circuit 6 to make the slave conductive strip lose power.

Claims (1)

1. An intelligent switching on/off socket, which includes a housing, jacks arranged in said housing, said jacks including master jacks and slave jacks, master conducting strips arranged in master jacks and slave conducting strips arranged in slave jacks, wherein
a control circuit is further arranged in said housing to make the slave conducting strips connect or disconnect upon connection or disconnection of the master conducting strips, the control circuit including a current sampling circuit used for current sampling when switching on/off the power of the master conducting strip; a signal amplification circuit used for amplifying sampling current signals; a reference signal acquisition circuit to determine the magnitude of a reference current according to current amplification signals; a memorizer to save reference current signal acquired by the reference signal acquisition circuit, a signal comparator to compare values of reference current signals with values of current amplification signals; a control output circuit to send out control signals; and a relay to receive control of the control signal of the control output circuit; wherein
said relay is connected with said slave conducting strips, said current sampling circuit is connected respectively with an input end of said signal amplification circuit and master conducting strips, an output end of said signal amplification circuit is connected respectively with an input end of said reference signal acquisition circuit and an input end of the signal comparator, an output end of said reference signal acquisition circuit is connected with an input end of said memorizer, an output end of said memorizer is connected with an input end of said signal comparator, an output end of said signal comparator is connected with an input end of said control output circuit, and an output end of the control output circuit is connected with said relay.
US12/479,453 2008-11-10 2009-06-05 Intelligent switch socket Expired - Fee Related US7969047B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN2008101221843A CN101420088B (en) 2008-11-10 2008-11-10 Intelligent switch socket
CN200810122184 2008-11-10
CN200810122184.3 2008-11-10

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US20100117457A1 US20100117457A1 (en) 2010-05-13
US7969047B2 true US7969047B2 (en) 2011-06-28

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EP (1) EP2184816A1 (en)
CN (1) CN101420088B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10348297B2 (en) * 2017-09-29 2019-07-09 Hongsheng Wu High power compact alternate current voltage reducing power strip

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010057343A2 (en) 2008-11-21 2010-05-27 American Power Conversion Corporation Method and apparatus for controlling distribution of power
EP2572411A4 (en) 2010-05-21 2015-08-12 American Power Conv Corp Method and apparatus for controlling distribution of power
CN102005677A (en) * 2010-10-09 2011-04-06 慈溪宏一电子有限公司 Intelligent master/auxiliary socket
US10459464B2 (en) 2012-09-03 2019-10-29 Schneider Electric It Corporation Method and apparatus for controlling distribution of power
CN103036119A (en) * 2012-12-28 2013-04-10 英特曼电工（常州）有限公司 Multifunctional intelligent energy-saving socket

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050157451A1 (en) * 2004-01-16 2005-07-21 Chin-Chang Kuo Intelligent power socket

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2386004B (en) 2001-12-07 2005-08-24 Peter Steven Robertson Socket assembly
US6759763B2 (en) * 2002-05-10 2004-07-06 Bits Ltd Apparatus for controlling power distribution to devices
DE102006053280A1 (en) 2006-11-02 2008-05-08 PEARL Buisness Connect Import/Export Geschäftskontakte GmbH Multiple plug socket for connecting e.g. personal computer with e.g. loudspeaker, has adjusting device with sensor for detecting power level at master socket, and memory unit for determining and storing value in dependence of power level
DE202006020124U1 (en) 2006-11-02 2007-12-13 PEARL Buisness Connect Import/Export Geschäftskontakte GmbH power strip

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050157451A1 (en) * 2004-01-16 2005-07-21 Chin-Chang Kuo Intelligent power socket

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10348297B2 (en) * 2017-09-29 2019-07-09 Hongsheng Wu High power compact alternate current voltage reducing power strip

Also Published As

Publication number Publication date
EP2184816A1 (en) 2010-05-12
CN101420088B (en) 2010-08-18
US20100117457A1 (en) 2010-05-13
CN101420088A (en) 2009-04-29

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